CN102359408A - Multi-directional resonant-type muffler of internal combustion engine - Google Patents

Multi-directional resonant-type muffler of internal combustion engine Download PDF

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Publication number
CN102359408A
CN102359408A CN201110303121XA CN201110303121A CN102359408A CN 102359408 A CN102359408 A CN 102359408A CN 201110303121X A CN201110303121X A CN 201110303121XA CN 201110303121 A CN201110303121 A CN 201110303121A CN 102359408 A CN102359408 A CN 102359408A
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CN
China
Prior art keywords
cavity
resonant cavity
resonant
combustion engine
ventilation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201110303121XA
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Chinese (zh)
Inventor
闫兵
董大伟
黄冠鑫
杨开华
华春蓉
窦国旺
涂启养
桑帅军
辛阳
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Southwest Jiaotong University
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Southwest Jiaotong University
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Publication date
Application filed by Southwest Jiaotong University filed Critical Southwest Jiaotong University
Priority to CN201110303121XA priority Critical patent/CN102359408A/en
Publication of CN102359408A publication Critical patent/CN102359408A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a multi-directional resonant-type muffler of an internal combustion engine. The muffler comprises a shell and an air inlet pipe installed at the air exhaust port of the internal combustion engine. The muffler is characterized in that the inner cavity of the shell is divided into a coaxial resonant cavity, a ventilation cavity and a positive resonant cavity by a rear plate and a front plate of the ventilation cavity sequentially; the air inlet pipe is inserted into the coaxial resonant cavity and is communicated with the rear plate of the ventilation cavity; the outer wall of the air inlet pipe is connected with the inner wall of the coaxial resonant cavity in a seal mode, and the pipe wall of the air inlet pipe is provided with a radial resonant hole; the side wall of the positive resonant cavity is a sandwiched layer which is internally filled with a layer of muffling material; the muffling material is axially provided with a small air ventilation pipe passing through the positive resonant cavity; and the front plate of the ventilation cavity is provided with an axial resonant hole which is communicated with the positive resonant cavity. Two resonant cavities are staggered in directions and positions, so that a muffling frequency band is widened, at the same time, the coupling effect between the resonant cavities is less, and the muffling effect is good.

Description

The multidirectional resonator muffler of internal-combustion engine
Technical field
The invention belongs to technical field of internal combustion engines, especially belong to the internal combustion engine exhaust silencer technical field.
Background technique
Internal combustion engine exhaust noise is meant engine cycle property discharging high pressure-temperature waste gas, and pressure and the density that makes surrounding atmosphere constantly is disturbed and the noise that produces.Silencing apparatus is installed in the relief opening of internal-combustion engine usually, is used for the reduction and the control of pneumatic noise, and it can be regarded as the part of pipeline, takes transmission or the generation of acoustical treatment to weaken noise through portion within it, but allows normally passing through of air-flow.Existing silencing apparatus mainly is a resonator muffler, and its most basic structure is to be made up of the straight tube of the tube wall perforate resonant cavity with the other sealing that connects.When sound wave was propagated in silencing apparatus, a part got in the other resonant cavity that connects through the hole on the pipeline, and another part continues along the main passage to propagate; Get into frequency of sound wave in the resonant cavity near its resonant frequency the time, will cause the resonance of resonant cavity, air will fierce back and forth vibration in aperture, constantly is converted into heat energy to acoustic energy, thereby reaches the purpose of noise elimination.
Resonator muffler be divided into the single-cavity resonance formula again and multi-cavity resonant.Because single-cavity resonance formula silencing apparatus selectivity is very strong, sound deadening capacity is big at the resonant frequency place, and its sound deadening capacity decay is very fast at the off-resonance frequence place, and it is confined to the decay of single narrow-band.Fundamental frequency that engine exhaust noise is big by a plurality of amplitudes, frequency band is narrow and frequency multiplication noise contribution are formed.Therefore, adopt a plurality of resonant cavities to eliminate exhaust sound for motor is general, corresponding one of them fundamental frequency of each resonant cavity or frequency multiplication composition.Though the multi-cavity resonator muffler can remedy the narrow shortcoming of single-cavity resonance formula silencing apparatus noise elimination frequency band; But; Traditional multi-cavity resonator muffler generally adopts the multi-cavity cascaded structure; Each resonant cavity aperture position of this structure is adjacent, direction is identical, and natural frequency close (like fundamental frequency at interval only) or become the frequency multiplication relation between adjacent resonant cavity can cause interfering with each other of resonant cavity sound wave; Have influence on the skew of resonant cavity resonant frequency and the variation of acoustic characteristics, finally influence actual noise elimination effect.
The power system of some large-scale fixed units (gas engine of using like the gas well station) can produce the high-intensity exhaust sound of broadband (ten frequencys multiplication of frequency about from the fundamental frequency of 11Hz to 90Hz when work; Sound pressure level reaches more than the 110dB); The people under this noise contributions, can produce harm to human body for a long time.If be positioned at densely populated area, also can cause to seriously influence to surrounding resident production and life.For controlling such exhaust sound, it is wide to be badly in need of developing frequency of noise elimination, the effective exhaust silencer of eliminating the noise.
Summary of the invention
The object of the present invention is to provide the multidirectional resonator muffler of a kind of internal-combustion engine, its anechoic frequency bandwidth, it is effective to eliminate the noise.
The technical solution adopted for the present invention to solve the technical problems is: the multidirectional resonator muffler of a kind of internal-combustion engine, comprise housing and the suction tude that is installed on internal combustion engine air vent, and its structural feature is:
Ventilated back plate, the header board of cavity of the inner chamber of described housing is divided into coaxial resonant cavity, ventilation cavity and positive resonant cavity three parts successively;
Described suction tude is inserted coaxial resonant cavity and is connected with the back plate of ventilation cavity, and the outer wall of suction tude is connected with the inner wall sealing of coaxial resonant cavity, and has the hole of radially resonating on the tube wall of suction tude;
The sidewall of described positive resonant cavity is an interlayer, is filled with one deck sound-absorbing material in the interlayer, axially has the tubule of giving vent to anger that runs through positive resonant cavity on the sound-absorbing material, and the header board of ventilation cavity has the axial oscillations hole that is communicated with positive resonant cavity.
Working procedure of the present invention is:
Produce a large amount of exhaust sounds in the internal combustion engine process, exhaust sound (sound wave) gets into the silencing apparatus suction tude through the relief opening of internal-combustion engine.After sound wave got into suction tude, a part got into coaxial resonant cavity through the radially resonance hole on the suction tude tube wall, by coaxial resonant cavity near the sound wave its natural frequency is subdued; Another part sound wave continues to propagate forward along the suction tude pipeline, gets into the ventilation cavity.
Sound wave is divided into two-part propagation after getting into the ventilation cavity, and a part gets into and gets into positive resonant cavity through the axial oscillations hole, by positive resonant cavity near the sound wave its natural frequency is subdued; Another part sound wave gets into the tubule of giving vent to anger on the ventilation cavity header board, and after high frequency sound wave was sopped up by sound-absorbing material, air was outside through the tubule of giving vent to anger.
Compared with prior art, the invention has the beneficial effects as follows:
One, the multidirectional resonator muffler of internal-combustion engine of the present invention is through the noise elimination effect of coaxial resonant cavity and positive two resonant cavities of resonant cavity, realized the noise elimination of wide range, medium and low frequency noise; Simultaneously, the sound-absorbing material through around the tubule of giving vent to anger sponges high-frequency noise its frequency of noise elimination wide ranges.
Two, be separated with the ventilation cavity mutually between coaxial resonant cavity and the positive resonant cavity; The two position is non-conterminous; And the direction in the axial oscillations hole on the Kong Yuzheng resonant cavity that radially resonates on the coaxial resonant cavity is vertical; The resonance sound-absorbing direction of the two is vertical, thereby has reduced coupling between two resonant cavities greatly, and it is effective to eliminate the noise.
Three, reach aperture, number and the distribution in radially resonate hole and axial oscillations hole through the size that changes coaxial resonant cavity and positive resonant cavity, can adjust and select noise elimination frequency band easily, can be applicable to the noise elimination of various types of internal-combustion engines.
Below in conjunction with accompanying drawing and specific embodiment the present invention is described further.
Description of drawings
Fig. 1 is the vertical sectional structure schematic representation of the embodiment of the invention.
Fig. 2 is the plan structure schematic representation of the embodiment of the invention.
Embodiment
A kind of embodiment of the present invention is: the multidirectional resonator muffler of a kind of internal-combustion engine comprises housing 1 and the suction tude 2 that is installed on internal combustion engine air vent.
Ventilated back plate 3A, the header board 3B of cavity 3 of the inner chamber of described housing 1 is divided into coaxial resonant cavity 4, ventilation cavity 3 and positive resonant cavity 5 three parts successively;
Described suction tude 2 is inserted coaxial resonant cavities 4 and is connected with the back plate 3A of ventilation cavity 3, and the outer wall of suction tude 2 is connected with the inner wall sealing of coaxial resonant cavity 4, and has the hole 4A that radially resonates on the tube wall of suction tude 2;
The sidewall of described positive resonant cavity 5 is an interlayer, is filled with one deck sound-absorbing material 6 in the interlayer, axially has the tubule 6A that gives vent to anger that runs through positive resonant cavity 5 on the sound-absorbing material 6, and the header board 3A of ventilation cavity 3 has the axial oscillations hole 5A that is communicated with positive resonant cavity 5.

Claims (1)

1. multidirectional resonator muffler of internal-combustion engine comprises housing (1) and is installed on the suction tude (2) of internal combustion engine air vent, it is characterized in that:
The inner chamber of described housing (1) is by the back plate (3A) of the cavity of ventilating (3)), header board (3B) is divided into coaxial resonant cavity (4), ventilation cavity (3) and resonant cavity (5) three parts just successively;
Described suction tude (2) insert coaxial resonant cavity (4) and with the back plate (3A) of ventilation cavity (3)) connect, the outer wall of suction tude (2) is connected with the inner wall sealing of coaxial resonant cavity (4), and has the hole of radially resonating (4A) on the tube wall of suction tude (2);
The sidewall of described positive resonant cavity (5) is an interlayer; Be filled with one deck sound-absorbing material (6) in the interlayer; Axially have the tubule of giving vent to anger (6A) that runs through positive resonant cavity (5) on the sound-absorbing material (6)), the header board (3A) of ventilation cavity (3) has the axial oscillations hole (5A) that is communicated with positive resonant cavity (5).
CN201110303121XA 2011-10-10 2011-10-10 Multi-directional resonant-type muffler of internal combustion engine Pending CN102359408A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201110303121XA CN102359408A (en) 2011-10-10 2011-10-10 Multi-directional resonant-type muffler of internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201110303121XA CN102359408A (en) 2011-10-10 2011-10-10 Multi-directional resonant-type muffler of internal combustion engine

Publications (1)

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CN102359408A true CN102359408A (en) 2012-02-22

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103742888A (en) * 2013-12-24 2014-04-23 华电重工股份有限公司 Low-noise waste heat boiler
CN110080856A (en) * 2019-04-28 2019-08-02 潍柴动力股份有限公司 Noise regulating device and automobile with it

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3807948A1 (en) * 1988-03-10 1989-09-28 Eberspaecher J Silencer for vehicle engines
CN1475659A (en) * 2002-08-12 2004-02-18 上海虎能电器有限公司 Exhaust device with resonance noise elimination as characteristics
CN2646393Y (en) * 2003-08-27 2004-10-06 洛阳西苑车辆与动力检验所有限公司 Four-chamber impedance composite type exhaust muffler of engine
RU2348751C1 (en) * 2007-06-08 2009-03-10 Олег Савельевич Кочетов Sound absorbing piece element of manufacturing facility
CN202273729U (en) * 2011-10-10 2012-06-13 西南交通大学 Multidirectional resonance type silencer for internal combustion engines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3807948A1 (en) * 1988-03-10 1989-09-28 Eberspaecher J Silencer for vehicle engines
CN1475659A (en) * 2002-08-12 2004-02-18 上海虎能电器有限公司 Exhaust device with resonance noise elimination as characteristics
CN2646393Y (en) * 2003-08-27 2004-10-06 洛阳西苑车辆与动力检验所有限公司 Four-chamber impedance composite type exhaust muffler of engine
RU2348751C1 (en) * 2007-06-08 2009-03-10 Олег Савельевич Кочетов Sound absorbing piece element of manufacturing facility
CN202273729U (en) * 2011-10-10 2012-06-13 西南交通大学 Multidirectional resonance type silencer for internal combustion engines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103742888A (en) * 2013-12-24 2014-04-23 华电重工股份有限公司 Low-noise waste heat boiler
CN103742888B (en) * 2013-12-24 2016-06-29 华电重工股份有限公司 A kind of Low-noise waste heat boiler
CN110080856A (en) * 2019-04-28 2019-08-02 潍柴动力股份有限公司 Noise regulating device and automobile with it

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Application publication date: 20120222

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